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1. Find the order of magnitude of the electric field needed in ionic solids to free electrons from the filled shells of ions. (Hint: Consider the binding energy of an electron and the approximate dimensions of an ion.)
2. Find the region of the electromagnetic spectrum at which crystals of Si, Ge, CdS, KC1,
Suppose the loop in the generator in the figure below is square and the length of each side of the loop is increased by a factor of nine. By what factor will the AC voltage change
A 45.0 kg girl is standing on a 136 kgplank. The plank, originally at rest, is free to slide on a frozenlake, which is a flat, frictionless surface. What is her velocity relative to the surface of ice
Object O1 is 15.2 cm to the left of a converging lens with a 11.8-cm focal length. A second lens is positioned 10.0 cm to the right of the first lens and is observed to form a virtual image at the position of the original object O1.
A steel wire of length 1.98m with circular cross section must stretch no more than 0.220cm when a tensile (stretching) force of 360N is applied to each end of the wire
(AThe student suggests using the second hand of a wall clock ti measure the time. Another student suggests using a stopwatch reading to 0.01s. Suggest and explain which timer is the more suitable to use
You have a thin metal sphere of unknown volume that contains helium gas at low pressure. Given that the volume of the metal sphere, pressure gauge, etc., was 341 mL, how many moles of helium gas would you have
Explain how Newton's Second Law of Motion APPLIES to a task you perform. Describe Examples how you move an object or person with constant speed AND also with constant acceleration.
The wire makes an angle of 44o with the magnetic field lines. If the magnitude of the magnetic force on the wire is 9.0 N, what is the current in the wire?
Consider an adiabatic turbine operating steadily. Does the work output of the turbine have to be equal to the decrease in energy of the steam flowing through it??
A tennis player standing 12.2 mfrom the net hits the ball at 3.60°above the horizontal. how fast was the ball moving when it left the racquet
A spring with a spring constant of 1.9×102N/m is attached to a1.6 kg mass and then set in motion. What is the frequency of the vibration? What is the period of the mass-spring system?
A laptop computer communicates with a router wirelessly, bymeans of radio signals. The router is connected by cable directlyto the Internet. The laptop is 8.1m from the router, and is downloading text images from the Internet at an average rate of..
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